CASPER — Is gravel a mineral? One may think so, but the Natrona County Board of County Commissioners would disagree. The answer to that question could decide the fate of much of Casper Mountain’s ...
Gabriela Farfan, the Smithsonian's curator of gems and minerals, answers the internet's burning questions about gemstones. Are all minerals crystals? How are diamonds cut? How do geodes form? Is the ...
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